core: introduce io.systemd.Manager.Describe method
Let's extend pid1's varlink interface and add a Describe method to get the global Manager object information as a JSON object (io.systemd.Manager.Describe). Because the new varlink interface should be available on both the user managers and the system manager, we also make the necessary changes to expose a varlink server on user managers.
This commit is contained in:
Ivan Kruglov
@@ -485,7 +485,7 @@ int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
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if (r < 0)
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return r;
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} else if ((val = startswith(l, "varlink-server-socket-address="))) {
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if (!m->varlink_server && MANAGER_IS_SYSTEM(m)) {
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if (!m->varlink_server) {
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r = manager_setup_varlink_server(m);
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if (r < 0) {
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log_warning_errno(r, "Failed to setup varlink server, ignoring: %m");
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@@ -0,0 +1,171 @@
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <sys/prctl.h>
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#include "build.h"
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#include "confidential-virt.h"
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#include "json-util.h"
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#include "manager-varlink.h"
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#include "manager.h"
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#include "syslog-util.h"
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#include "taint.h"
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#include "version.h"
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#include "varlink-common.h"
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#include "virt.h"
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#include "watchdog.h"
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static int manager_environment_build_json(sd_json_variant **ret, const char *name, void *userdata) {
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_cleanup_strv_free_ char **l = NULL;
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Manager *m = ASSERT_PTR(userdata);
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int r;
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assert(ret);
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r = manager_get_effective_environment(m, &l);
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if (r < 0)
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return r;
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if (strv_isempty(l)) {
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*ret = NULL;
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return 0;
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}
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return sd_json_variant_new_array_strv(ret, l);
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}
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static int manager_context_build_json(sd_json_variant **ret, const char *name, void *userdata) {
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Manager *m = ASSERT_PTR(userdata);
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_cleanup_strv_free_ char **taints = NULL;
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taints = taint_strv();
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if (!taints)
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return -ENOMEM;
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return sd_json_buildo(ASSERT_PTR(ret),
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SD_JSON_BUILD_PAIR_STRING("Version", GIT_VERSION),
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SD_JSON_BUILD_PAIR_STRING("Architecture", architecture_to_string(uname_architecture())),
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SD_JSON_BUILD_PAIR_STRING("Features", systemd_features),
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JSON_BUILD_PAIR_STRV_NON_EMPTY("Taints", taints),
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SD_JSON_BUILD_PAIR_STRV("UnitPath", m->lookup_paths.search_path),
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JSON_BUILD_PAIR_STRV_NON_EMPTY("Environment", m->transient_environment),
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SD_JSON_BUILD_PAIR_STRING("DefaultStandardOutput", exec_output_to_string(m->defaults.std_output)),
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SD_JSON_BUILD_PAIR_STRING("DefaultStandardError", exec_output_to_string(m->defaults.std_error)),
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SD_JSON_BUILD_PAIR_BOOLEAN("ServiceWatchdogs", m->service_watchdogs),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultTimerAccuracyUSec", m->defaults.timer_accuracy_usec),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutStartUSec", m->defaults.timeout_start_usec),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutStopUSec", m->defaults.timeout_stop_usec),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultTimeoutAbortUSec", manager_default_timeout_abort_usec(m)),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultDeviceTimeoutUSec", m->defaults.device_timeout_usec),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultRestartUSec", m->defaults.restart_usec),
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JSON_BUILD_PAIR_RATELIMIT("DefaultStartLimit", &m->defaults.start_limit),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultCPUAccounting", m->defaults.cpu_accounting),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultBlockIOAccounting", m->defaults.blockio_accounting),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultIOAccounting", m->defaults.io_accounting),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultIPAccounting", m->defaults.ip_accounting),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultMemoryAccounting", m->defaults.memory_accounting),
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SD_JSON_BUILD_PAIR_BOOLEAN("DefaultTasksAccounting", m->defaults.tasks_accounting),
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SD_JSON_BUILD_PAIR_CALLBACK("DefaultLimits", rlimit_table_build_json, m->defaults.rlimit),
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SD_JSON_BUILD_PAIR_UNSIGNED("DefaultTasksMax", cgroup_tasks_max_resolve(&m->defaults.tasks_max)),
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JSON_BUILD_PAIR_FINITE_USEC("DefaultMemoryPressureThresholdUSec", m->defaults.memory_pressure_threshold_usec),
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SD_JSON_BUILD_PAIR_STRING("DefaultMemoryPressureWatch", cgroup_pressure_watch_to_string(m->defaults.memory_pressure_watch)),
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JSON_BUILD_PAIR_FINITE_USEC("TimerSlackNSec", (uint64_t) prctl(PR_GET_TIMERSLACK)),
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SD_JSON_BUILD_PAIR_STRING("DefaultOOMPolicy", oom_policy_to_string(m->defaults.oom_policy)),
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SD_JSON_BUILD_PAIR_INTEGER("DefaultOOMScoreAdjust", m->defaults.oom_score_adjust),
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SD_JSON_BUILD_PAIR_STRING("CtrlAltDelBurstAction", emergency_action_to_string(m->cad_burst_action)));
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}
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static int log_level_build_runtime_json(sd_json_variant **ret, const char *name, void *userdata) {
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_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
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int log_max_level = log_get_max_level();
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int r;
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assert(ret);
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for (LogTarget log_target = 0; log_target < _LOG_TARGET_SINGLE_MAX; log_target++) {
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_cleanup_free_ char *log_level_string = NULL;
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int target_max_level = log_get_target_max_level(log_target);
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const char *log_target_string = log_target_to_string(log_target);
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int log_level = MIN(log_max_level, target_max_level);
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r = log_level_to_string_alloc(log_level, &log_level_string);
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if (r < 0)
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return r;
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r = sd_json_variant_set_field_string(&v, log_target_string, log_level_string);
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if (r < 0)
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return r;
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}
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*ret = TAKE_PTR(v);
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return 0;
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}
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static int manager_runtime_build_json(sd_json_variant **ret, const char *name, void *userdata) {
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Manager *m = ASSERT_PTR(userdata);
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dual_timestamp watchdog_last_ping;
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return sd_json_buildo(ASSERT_PTR(ret),
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SD_JSON_BUILD_PAIR_STRING("Virtualization", virtualization_to_string(detect_virtualization())),
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SD_JSON_BUILD_PAIR_STRING("ConfidentialVirtualization", confidential_virtualization_to_string(detect_confidential_virtualization())),
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JSON_BUILD_PAIR_STRING_NON_EMPTY("ConfirmSpawn", manager_get_confirm_spawn(m)),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("FirmwareTimestamp", &m->timestamps[MANAGER_TIMESTAMP_FIRMWARE]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("LoaderTimestamp", &m->timestamps[MANAGER_TIMESTAMP_LOADER]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("KernelTimestamp", &m->timestamps[MANAGER_TIMESTAMP_KERNEL]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UserspaceTimestamp", &m->timestamps[MANAGER_TIMESTAMP_USERSPACE]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("FinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("SecurityStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_SECURITY_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("SecurityFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_SECURITY_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("GeneratorsStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_GENERATORS_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("GeneratorsFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_GENERATORS_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("UnitsLoadTimestamp", &m->timestamps[MANAGER_TIMESTAMP_UNITS_LOAD]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDSecurityStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_SECURITY_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDSecurityFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDGeneratorsStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_GENERATORS_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDGeneratorsFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDUnitsLoadStartTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START]),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("InitRDUnitsLoadFinishTimestamp", &m->timestamps[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH]),
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SD_JSON_BUILD_PAIR_BOOLEAN("ShowStatus", manager_get_show_status_on(m)),
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JSON_BUILD_PAIR_CALLBACK_NON_NULL("LogLevel", log_level_build_runtime_json, m),
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SD_JSON_BUILD_PAIR_STRING("LogTarget", log_target_to_string(log_get_target())),
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SD_JSON_BUILD_PAIR_UNSIGNED("NNames", hashmap_size(m->units)),
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SD_JSON_BUILD_PAIR_UNSIGNED("NFailedUnits", set_size(m->failed_units)),
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SD_JSON_BUILD_PAIR_UNSIGNED("NJobs", hashmap_size(m->jobs)),
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SD_JSON_BUILD_PAIR_UNSIGNED("NInstalledJobs", m->n_installed_jobs),
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SD_JSON_BUILD_PAIR_UNSIGNED("NFailedJobs", m->n_failed_jobs),
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SD_JSON_BUILD_PAIR_REAL("Progress", manager_get_progress(m)),
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JSON_BUILD_PAIR_CALLBACK_NON_NULL("Environment", manager_environment_build_json, m),
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JSON_BUILD_PAIR_STRING_NON_EMPTY("WatchdogDevice", watchdog_get_device()),
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JSON_BUILD_PAIR_DUAL_TIMESTAMP_NON_NULL("WatchdogLastPingTimestamp", watchdog_get_last_ping_as_dual_timestamp(&watchdog_last_ping)),
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JSON_BUILD_PAIR_STRING_NON_EMPTY("ControlGroup", m->cgroup_root),
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SD_JSON_BUILD_PAIR_STRING("SystemState", manager_state_to_string(manager_state(m))),
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SD_JSON_BUILD_PAIR_UNSIGNED("ExitCode", m->return_value),
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JSON_BUILD_PAIR_FINITE_USEC("RuntimeWatchdogUSec", manager_get_watchdog(m, WATCHDOG_RUNTIME)),
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JSON_BUILD_PAIR_FINITE_USEC("RuntimeWatchdogPreUSec", manager_get_watchdog(m, WATCHDOG_PRETIMEOUT)),
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JSON_BUILD_PAIR_STRING_NON_EMPTY("RuntimeWatchdogPreGovernor", m->watchdog_pretimeout_governor),
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JSON_BUILD_PAIR_FINITE_USEC("RebootWatchdogUSec", manager_get_watchdog(m, WATCHDOG_REBOOT)),
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JSON_BUILD_PAIR_FINITE_USEC("KExecWatchdogUSec", manager_get_watchdog(m, WATCHDOG_KEXEC)),
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SD_JSON_BUILD_PAIR_UNSIGNED("SoftRebootsCount", m->soft_reboots_count));
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}
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int vl_method_describe_manager(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) {
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_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
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Manager *manager = ASSERT_PTR(userdata);
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int r;
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assert(parameters);
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if (sd_json_variant_elements(parameters) > 0)
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return sd_varlink_error_invalid_parameter(link, parameters);
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r = sd_json_buildo(&v,
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SD_JSON_BUILD_PAIR_CALLBACK("Context", manager_context_build_json, manager),
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SD_JSON_BUILD_PAIR_CALLBACK("Runtime", manager_runtime_build_json, manager));
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if (r < 0)
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return log_error_errno(r, "Failed to build manager JSON data: %m");
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return sd_varlink_reply(link, v);
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}
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@@ -0,0 +1,7 @@
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include "sd-json.h"
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#include "sd-varlink.h"
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int vl_method_describe_manager(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata);
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@@ -43,6 +43,7 @@ libcore_sources = files(
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'load-fragment.c',
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'manager-dump.c',
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'manager-serialize.c',
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'manager-varlink.c',
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'manager.c',
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'mount.c',
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'namespace.c',
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+61
-29
@@ -3,17 +3,21 @@
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#include "sd-varlink.h"
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#include "dynamic-user.h"
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#include "format-util.h"
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#include "json-util.h"
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#include "manager.h"
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#include "manager-varlink.h"
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#include "mkdir-label.h"
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#include "strv.h"
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#include "unit.h"
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#include "user-util.h"
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#include "varlink.h"
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#include "varlink-internal.h"
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#include "varlink-io.systemd.Manager.h"
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#include "varlink-io.systemd.ManagedOOM.h"
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#include "varlink-io.systemd.UserDatabase.h"
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#include "varlink-io.systemd.service.h"
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#include "varlink-serialize.h"
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#include "varlink-util.h"
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typedef struct LookupParameters {
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@@ -593,35 +597,50 @@ int manager_setup_varlink_server(Manager *m) {
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if (m->varlink_server)
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return 0;
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if (!MANAGER_IS_SYSTEM(m))
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return -EINVAL;
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sd_varlink_server_flags_t flags = SD_VARLINK_SERVER_INHERIT_USERDATA;
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if (MANAGER_IS_SYSTEM(m))
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flags |= SD_VARLINK_SERVER_ACCOUNT_UID;
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r = varlink_server_new(&s, SD_VARLINK_SERVER_ACCOUNT_UID|SD_VARLINK_SERVER_INHERIT_USERDATA, m);
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r = varlink_server_new(&s, flags, m);
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if (r < 0)
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return log_debug_errno(r, "Failed to allocate Varlink server: %m");
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r = sd_varlink_server_add_interface_many(
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s,
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&vl_interface_io_systemd_UserDatabase,
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&vl_interface_io_systemd_ManagedOOM,
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&vl_interface_io_systemd_Manager,
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&vl_interface_io_systemd_service);
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if (r < 0)
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return log_debug_errno(r, "Failed to add interfaces to varlink server: %m");
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r = sd_varlink_server_bind_method_many(
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s,
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"io.systemd.UserDatabase.GetUserRecord", vl_method_get_user_record,
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"io.systemd.UserDatabase.GetGroupRecord", vl_method_get_group_record,
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"io.systemd.UserDatabase.GetMemberships", vl_method_get_memberships,
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"io.systemd.ManagedOOM.SubscribeManagedOOMCGroups", vl_method_subscribe_managed_oom_cgroups,
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"io.systemd.Manager.Describe", vl_method_describe_manager,
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"io.systemd.service.Ping", varlink_method_ping,
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"io.systemd.service.GetEnvironment", varlink_method_get_environment);
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if (r < 0)
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return log_debug_errno(r, "Failed to register varlink methods: %m");
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r = sd_varlink_server_bind_disconnect(s, vl_disconnect);
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if (r < 0)
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return log_debug_errno(r, "Failed to register varlink disconnect handler: %m");
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if (MANAGER_IS_SYSTEM(m)) {
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r = sd_varlink_server_add_interface_many(
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s,
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&vl_interface_io_systemd_UserDatabase,
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&vl_interface_io_systemd_ManagedOOM);
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if (r < 0)
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return log_debug_errno(r, "Failed to add interfaces to varlink server: %m");
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r = sd_varlink_server_bind_method_many(
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s,
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"io.systemd.UserDatabase.GetUserRecord", vl_method_get_user_record,
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"io.systemd.UserDatabase.GetGroupRecord", vl_method_get_group_record,
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"io.systemd.UserDatabase.GetMemberships", vl_method_get_memberships,
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"io.systemd.ManagedOOM.SubscribeManagedOOMCGroups", vl_method_subscribe_managed_oom_cgroups);
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if (r < 0)
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return log_debug_errno(r, "Failed to register varlink methods: %m");
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r = sd_varlink_server_bind_disconnect(s, vl_disconnect);
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if (r < 0)
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return log_debug_errno(r, "Failed to register varlink disconnect handler: %m");
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}
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r = sd_varlink_server_attach_event(s, m->event, EVENT_PRIORITY_IPC);
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if (r < 0)
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@@ -645,24 +664,15 @@ static int manager_varlink_init_system(Manager *m) {
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bool fresh = r > 0;
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if (!MANAGER_IS_TEST_RUN(m)) {
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(void) mkdir_label("/run/systemd/userdb", 0755);
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FOREACH_STRING(address,
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"/run/systemd/userdb/io.systemd.DynamicUser",
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VARLINK_ADDR_PATH_MANAGED_OOM_SYSTEM,
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"/run/systemd/io.systemd.Manager") {
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/* We might have got sockets through deserialization. Do not bind to them twice. */
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if (!fresh && varlink_server_contains_socket(m->varlink_server, address))
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continue;
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FOREACH_STRING(address, "/run/systemd/userdb/io.systemd.DynamicUser", VARLINK_ADDR_PATH_MANAGED_OOM_SYSTEM) {
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if (!fresh) {
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/* We might have got sockets through deserialization. Do not bind to them twice. */
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bool found = false;
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LIST_FOREACH(sockets, ss, m->varlink_server->sockets)
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if (path_equal(ss->address, address)) {
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found = true;
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break;
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}
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if (found)
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continue;
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}
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r = sd_varlink_server_listen_address(m->varlink_server, address, 0666);
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r = sd_varlink_server_listen_address(m->varlink_server, address, 0666 | SD_VARLINK_SERVER_MODE_MKDIR_0755);
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if (r < 0)
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return log_error_errno(r, "Failed to bind to varlink socket '%s': %m", address);
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}
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@@ -672,6 +682,8 @@ static int manager_varlink_init_system(Manager *m) {
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}
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static int manager_varlink_init_user(Manager *m) {
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int r;
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assert(m);
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if (!MANAGER_IS_USER(m))
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@@ -680,6 +692,26 @@ static int manager_varlink_init_user(Manager *m) {
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if (MANAGER_IS_TEST_RUN(m))
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return 0;
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r = manager_setup_varlink_server(m);
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if (r < 0)
|
||||
return log_error_errno(r, "Failed to set up varlink server: %m");
|
||||
bool fresh = r > 0;
|
||||
|
||||
FOREACH_STRING(a,
|
||||
"systemd/io.systemd.Manager") {
|
||||
_cleanup_free_ char *address = NULL;
|
||||
address = path_join(m->prefix[EXEC_DIRECTORY_RUNTIME], a);
|
||||
if (!address)
|
||||
return -ENOMEM;
|
||||
/* We might have got sockets through deserialization. Do not bind to them twice. */
|
||||
if (!fresh && varlink_server_contains_socket(m->varlink_server, address))
|
||||
continue;
|
||||
|
||||
r = sd_varlink_server_listen_address(m->varlink_server, address, 0666 | SD_VARLINK_SERVER_MODE_MKDIR_0755);
|
||||
if (r < 0)
|
||||
return log_error_errno(r, "Failed to bind to varlink socket '%s': %m", address);
|
||||
}
|
||||
|
||||
return manager_varlink_managed_oom_connect(m);
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user